Abstract: The experiment on sowing time for the processing tomato variety liger 87-5 in the Shihhotze Regions of the Xinjiang Autonomous Region was conducted to study the influence of sowing time on the agronomic characters,main quality components and yield of the processing tomato.The results showed that different sowing times had greatly influenced on tomato's plant height and stem diameter.The stem diameter in early sowing time on 5th April was the thickest,while the plant height in late sowing time on 5th May was the highest.The different sowing times also had greatly influenced on the main quality components of tomato.The average content of vitamin C,soluble sugar,and sugar and acid ratio in the middle sowing time on 15th April was the highest,while they were lowest in late sowing time on 5th May.The average content of the organic acid increased as the sowing time delayed.The average content of NO3 did not change in the different sowing time.The main factors that influenced the yield in the different sowing times were the single fruit weight and then the fruit number per plant.The tomato yield in early sowing time was higher than in late sowing time.It was suggested that the suitable sowing time for the processing tomato variety liger87-5 in the Shihhotze Regions was in the last ten days of April.

Key words: Processing tomato Liger 87-5, Processing tomato Liger 87-5, Suitable sowing time, Quality, Yield